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- Bastien Chopard, Alexandre Dupuis, Alexandre Masselot, Pascal O. Luthi
- Advances in Complex Systems
- 2002

We discuss the cellular automata approach and its extensions, the lattice Boltzmann and multiparticle methods. The potential of these techniques is demonstrated in the case of modeling complex systems. In particular, we consider applications taken from various fields of physics, such as reaction-diffusion systems, pattern formation phenomena, fluid flows,… (More)

- J B Glattfelder, A Dupuis, R B Olsen
- 2008

We have discovered 17 new empirical scaling laws in foreign exchange data-series that hold for close to three orders of magnitude and across 13 currency exchange rates. Our statistical analysis crucially depends on an event-based approach that measures the relationship between different types of events. The scaling laws give an accurate estimation of the… (More)

We present a simple cellular automata model of traffic in urban environments in which road junctions are implemented as rotaries. We study its generic properties and compare the numerical simulations with analytical results. We show that the dynamics is well described in terms of the queues that form at the crossings. We apply our model to the case of the… (More)

- Alexandre Dupuis, Bastien Chopard
- Physical review. E, Statistical, nonlinear, and…
- 2003

This contribution proposes an alternative lattice Boltzmann grid refinement algorithm that overcomes the drawbacks that plague existing approaches. We demonstrate that this algorithm is accurate and applicable for all values of the relaxation time. We also show that this algorithm can significantly speed up the flow settlement process. By using a hierarchy… (More)

- Paul Albuquerque, Alexandre Dupuis
- ACRI
- 2002

We define a methodology to quantify market activity on a 24 hour basis by defining a scale, the so-called scale of market quakes (SMQ). The SMQ is designed within a framework where we analyse the dynamics of excess price moves from one directional change of price to the next. We use the SMQ to quantify the FX market and evaluate the performance of the… (More)

We consider a simple lattice gas model to simulate erosion, deposition and particle transport in a streaming fluid. In our approach, the fluid is described by a standard lattice Boltzmann model and the granular suspension by a multiparticle cellular automata. A good agreement is obtained between the predictions of the model and field measurements, as… (More)

- Professeur B. Chopard, Alexandre DUPUIS

<lb>v Acknowledgment<lb>vii

- Alexandre Dupuis, Bastien Chopard
- Scalable Computing: Practice and Experience
- 1998

Road traffic microsimulations based on the individual motion of all vehicles are now recognized as an important tool to describe, understand and manage road traffic. Cellular automata models are a very efficient way to implement car motion. This paper presents a detailed description of a parallel cellular automata traffic microsimulator. We discuss the data… (More)

- Alexandre Dupuis, Bastien Chopard
- Future Generation Comp. Syst.
- 2000

We present a parallel library which can be used for any lattice gas (LG) application. A highly reusable implementation, as well as a general parallelization scheme, based on a graph partitioning technique are developed. We show that the performance we obtain with our approach compares favorably with the plain, classical implementation of LG models on… (More)